A sparkler (from wikipedia) is a type of hand-held firework that burns slowly while emitting colored flames, sparks, and other effects. They rely on REDOX reactions and therefore they contain two main components:
FUEL (reducing agent). There are two types:
- Metallic fuel, mandatory to make sparks; size of particles influences appearance of the sparks
- Aluminium or magnesium or magnalium, producing white sparks
- Iron, producing orange branching sparks
- Titanium, producing rich white sparks
- Ferrotitanium, for yellow-gold sparkles
- Additional fuel, optional, modifying the burning speed
- Sulfur
- Charcoal
OXIDIZER (oxidant agent). There are several types
- Potassium nitrate
- Barium nitrate
- Strontium nitrate
- Potassium perchlorate, more powerful but potentially explosive
As the sparklers contain their own oxidizer they don´t need to be in contact with air to burn out and therefore they work underwater!!
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